Issues with copilot on android

From last week or so when ever i open any word document with microsoft 365 copilot chat window opens and cannot open word file. After reinstalling the app it works for some time and then again cannot open the word file. For PDf files also copilot chat window opens and after opening again and again may be after 3/4 times PDF opens. In the app most of the times create new word document or excel document option does not show. The copilot thing is irritating so pls let me know how to solve this